Martindale Pharmaceuticals is issuing a "caution in use" concerning the labelling on ampoules of all current batches of calcium chloride injection 2.5millimoles of Ca2+ in 5ml. This is because the concentration of calcium stated on the ampoule label may be misinterpreted as 25millimoles in 5ml rather than 2.5millimoles in 5ml because the printing on the label is unclear. The company has modified the ampoule label for future batches. For further information contact the company's customer services (tel 01708 386660).